Topeak MTX Trunk Bag EXP with Side Panniers Expandable bike bag with divided main compartment and expandable top 2 side panels with expandable panniers add even more storage space 420-denier nylon construction with rigid molded side panels Shoulder strap for easy carrying; RedLite clip and elastic top bungees 1,010 cubic inches of storage; measures 9.8 x 14.1 x 8.5 inches (W x H x D)